I wish I could say, "Oh, Yeti isn't so hard" like I did with Brothers Gnomus and Sasquatch. However, both my Craaazy wins required a commando corn (played by yours truly 😉) One of the major keys to success on the hard and craaazy runs was Commando Mode being saved and triggered at or on the way to the boss. This is especially powerful if you are lucky enough to be close to the boss when you drink the slushie. It means you can land x2 damage buffed shuck shots in a single slushie.
As for general strategy. In one run I had a toxic pea, vamp flower, commando corn and an ice pea. (This team had no means of communication) In the other was a torchwood, commando corn, fire flower and vamp flower. (This team all had headsets) Both involved two teams, on the covered bridge was the commando corn. (Get comfy, this is your new home.) The other involved the remaining players grouping together on or near the stone bridge.
*A tip from my brother, who played the toxic pea in the first match, is to get as many players as possible on the cabin nearest to the stone bridge. Using potted plants or another player it is possible for any class to get up there. This won't deal with heroes or bosses but will nearly eliminate the trouble with browncoats and mini yeti's.
Then once the Yeti begins to dance the corn should be able to eliminate all but 3 cones with ease. Two of the remaining cones are behind and under the stone bridge, these are hard to hit but not impossible. The last is on the bus and cannot be hit from the covered bridge. Honestly, save the three cones I mentioned the corn should be able to handle the entire phase, but assuming the others aren't downed their help will only make things easier.
Once the yeti is done dancing your hardest task happens, you need to meet up with the group. Choose your path carefully and remember that husk hop can help you cover distance in an emergency. Really, this is the hard phase for everyone. Waiting for the fool, it's time to survive and clean house for the Yeti run. DO NOT ignore common enemies they can overwhelm you very quickly. Second, if at all possible eliminate all the bosses before engaging the fool. (As a team this should be an relatively simple task.)
*A tip from the fire flower on the second run is, during this phase try placing 3 goop shrooms or ice shrooms in the area by the cabin and grouping up there. (This helps the corn out too.) It will help significantly with dealing with the King's Army, bosses or otherwise.
My last advice involves the slushie run. Don't be afraid to be patient, as long as you have reasonable DPS (As I said before commando corn really helps) you will have no trouble taking the Yeti down in 3-5 cycles, even with unlucky fool placement. (At 30 minutes on Craaazy there is plenty of time.) In both my successes we had over 5 minutes left. Survival is your enemy here, not time. Also consider, it only takes a few seconds for the fool or king to cover a lot of ground. Being patient can lead to better placement and even a few extra seconds of slushie can make a large difference in the amount of damage the team deals. Just remember, a few seconds or even a minute setting up a successful slushie run is better then a failed run or needing to do another cycle.
Once you unleash your plant fury upon the Yeti its time for the commando corn to make their way back to the covered bridge. Like before this is one of the harder steps and this time you can't husk hop to safety since you need it to get on the bridge. The rest of the team need to stick together and make their way back to the stone bridge. (It may also be beneficial to escort the corn back to their perch if they are struggling.) Also as a last note, as a sunflower if you are going to use your beam (which is often risky dps that isn't really needed. Damage from the pulse is plenty and keeps the vamp flower healed) do it in the last 10 seconds of the slushie. That way if the slushie holder does die there isn't a major loss in damage dealt. (Also be sure your healing pot is up.) In the case of two sunflowers, like I had on the second run, make sure to coordinate who beams when so that both sunflowers are never beaming at once.
I could go into more detail but I would be going into basic concepts of the run. (Setting up the cone, freezing enemies and so on.) Of course, I can answer questions if people have them. I hope some of this helps, I wish I could explain a run without a legendary variant, but frankly, I'm not sure I would have won otherwise. But, having had commando corn I can say that both runs went very smoothly with very few close calls.
